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Hi everyone!
I'm about to buy a pair of 2235H, which the seller say, are about 6 - 7 year old, in mint condition and only sparingly used, after the first year or so and then have been laying in storage the last couple of years.
What kind of serial numbers should be expected, if this is true?
Anyone who could give me a rough estimate and perhaps also tell me what year they were first manufactured?
BR
Roland
Watch the suspension/spider for sag depending on how they were stored.
Rob:)
:) I think they came out in 1981.
right,
I bought a pair a few years ago and they had to be reconed. At first they looked ok, but when I connected them and fed them some signal the foam edge had gone in 5 minutes
look out for the sag, if they were stored on their fronts or back, the spider won't be flat / level anymore because the weight of the cone, this would make them a definate recone I'd say because the coil won't be centered [before / aft] in the magnetic field anymore
they should have been stored upright, the way they are normally mounted
The only way to try them is listening if you can't see any damage. If anything goes after playing hard, well they are no good and need repair. I do turn mine around once in a while on my 4435's. I had my speakers often stored away for years when I was still working around the globe. Many did well after years of non proper storage. Do not panik, just try... Every 2235 is worth repairing.
I should have sad 2234. 2235 without the mass ring of course.
If most people agree that woofers should be stored in a vertical position as if they were mounted in a cabinet baffle board, then why does JBL pack them up in boxes with the woofers facing down??? I think it is because that is ok as the cone can only drop forward a prescribed amount till it hits the bottom of the styrofoam padding on which it rests on. This amount would seem to be ok as JBL seems to think so.:hmm:
To echo the some of the other comments and add a little too; I've owned a pair that sat UNUSED for 10years with about 5 minutes of total run time on them, still installed (vertically) in the SUMO brand, JBL B380 clones and they refoamed to an excellent performance level, I really couldn't tell any difference from all the other 2235H's that I've heard that were in good working order. The key is the spiders, like Robb said, if there is going to be trouble, most of the time you can see the problem clearly and other times you will just have to take a chance on a refoam job. I had the pleasure of looking into a 2235H recently on a visit to my recone specialist, Mr. Marlon Balan, Owner of MB Sound here in Bakersfield. You would be very suprized to see just how LITTLE travel (excursion) that this woofer actually has. The Mass Ring is right under the dustcap. If your spiders are weak and sagging, you're gonna know it and right quick!. I hope this helps my Friend, Best Regards to you, Steve G
BTW: There is nothing like a new reconed JBL transducer if all else fails-S.G.
Sorry, I haven't been able to go on the internet for two days. My provider ran into some problems when upgrading the service. :(
Thank you all for your help! They looked very good and clean, so I bought them of course, since the price was right. No sagging and the foam feels soft and even.
The serial numbers is in the 11000 region. Could this indicate that they were made about 10 years ago, or is it likely they are older?
I've also tested them in one of my MTM's to compare them with my 2215.
Without having made any adjustments yet, other than shortening the port tube by 4cm, I can say the 2235's go somewhat deeper than the 2215's, as they should. :applaud:
A bit OT; I also managed to buy another Yamaha Studio amp PC2602M, so I was thinking of letting them take care of the 2235's in bridged mode. This would mean I can feed each 2235 with 800W. :D
However, I'm a bit concerned if the impedance of the 2235 can go below the 8 Ohm, Yamaha (manual) says, is the minimum impedance, or isn't it that critical?
BR
Roland